[llvm-branch-commits] [libcxx] [release/19.x][libc++] Adjust the version of __cpp_lib_ranges in C++20 mode (PR #109324)

[Louis Dionne via llvm-branch-commits]

ldionne wrote:

> I guess [6f6422f](https://github.com/llvm/llvm-project/commit/6f6422f4a2b8647a59936c131e50a79906d89510) and [cdd608b](https://github.com/llvm/llvm-project/commit/cdd608b8f0ce090b3568238387df368751bdbb5d) should also be cherry-picked. @tru @ldionne

This is now https://github.com/llvm/llvm-project/pull/110259

https://github.com/llvm/llvm-project/pull/109324